Precoding information indication method and device and storage medium

Abstract

The invention provides a precoding information indication method and device and a storage medium, relates to the technical field of wireless communication, and can improve the receiving efficiency of a receiving end. The method comprises the following steps: determining a first precoding vector; processing the first pre-coding vector to obtain a second pre-coding vector, the second pre-coding vector being used for a reference signal; and determining pre-coding indication information based on the first pre-coding vector and the second pre-coding vector, and sending the pre-coding indication information to the terminal equipment.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technology, and in particular to a method, device and storage medium for indicating precoding information. Background Art

[0002] In wireless communication systems, in order to improve energy efficiency and spectrum efficiency, multi-antenna base stations usually use beams to send signals to users or perform beam training. In actual transmission, due to the hardware limitations of the base station antenna array and the limitations of the precoding vector F, there will be a difference between the actual transmitted precoding vector and the theoretical precoding vector, and this difference will reduce the receiving efficiency of the receiving end. Summary of the invention

[0003] The embodiments of the present disclosure provide a method, device and storage medium for indicating precoding information, which can improve the receiving efficiency of a receiving end.

[0004] On the one hand, a method for indicating precoding information is provided, which is applied to a base station, and includes:

[0005] determining a first precoding vector;

[0006] Processing the first precoding vector to obtain a second precoding vector, where the second precoding vector is used for a reference signal;

[0007] Precoding indication information is determined based on the first precoding vector and the second precoding vector, and the precoding indication information is sent to the terminal device.

[0008] On the other hand, a method for indicating precoding information is provided, which is applied to a terminal device, including:

[0009] Receive precoding indication information sent by a base station; wherein the precoding indication information is determined by a first precoding vector and a second precoding vector; the second precoding vector is determined based on the first precoding vector, and the second precoding vector is used to measure a reference signal.

[0010] On the other hand, an indication device is provided, which is applied to a base station, including:

[0011] A determination module, configured to determine a first precoding vector;

[0012] A processing module, configured to process the first precoding vector to obtain a second precoding vector, where the second precoding vector is used for a reference signal;

[0013] The determination module is further used to determine the precoding indication information based on the first precoding vector and the second precoding vector;

[0014] The sending module is used to send precoding indication information to the terminal device.

[0015] On the other hand, there is provided an indication device, applied to a terminal device, comprising:

[0016] The receiving module is used to receive precoding indication information sent by the base station; wherein the precoding indication information is determined by a first precoding vector and a second precoding vector; the second precoding vector is determined based on the first precoding vector, and the second precoding vector is used to measure a reference signal.

[0017] On the other hand, a communication device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is used to store a computer program; and when the processor executes the computer program, the method for indicating precoding information of any of the above embodiments is implemented.

[0018] On the other hand, a computer-readable storage medium is provided, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the method for indicating precoding information of any of the above embodiments is implemented.

[0019] On the other hand, a computer program product is provided. The computer program product includes computer program instructions. When the computer program instructions are executed by a processor, the method for indicating precoding information of any of the above embodiments is implemented.

[0020] The embodiment of the present disclosure provides a method for indicating precoding information, first determining a first precoding vector; then processing the first precoding vector to obtain a second precoding vector, the second precoding vector being used for a reference signal; finally determining precoding indication information based on the first precoding vector and the second precoding vector, and sending the precoding indication information to a terminal device. It can be understood that based on the method provided by the embodiment of the present disclosure, when the second precoding vector used in actually sending a reference signal is inconsistent with the first precoding vector obtained by theoretical calculation, the precoding indication information can be determined based on the first precoding vector and the second precoding vector, and the terminal device can be informed to help the terminal device better receive the reference signal and improve the signal reception efficiency of the terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings required for use in some embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and a person skilled in the art can also obtain other drawings based on these drawings.

[0022] Figure 1 A schematic diagram of the architecture of a mobile communication network provided for some embodiments of the present disclosure;

[0023] Figure 2 A schematic diagram of the structure of a base station provided in some embodiments of the present disclosure;

[0024] Figure 3 The process of indicating the precoding information provided by some embodiments of the present disclosure Figure 1 ;

[0025] Figure 4 The process of indicating the precoding information provided by some embodiments of the present disclosure Figure 2 ;

[0026] Figure 5 The process of indicating the precoding information provided by some embodiments of the present disclosure Figure 3 ;

[0027] Figure 6 A transmission diagram of precoding indication information provided in some embodiments of the present disclosure Figure 1 ;

[0028] Figure 7 The process of indicating the precoding information provided by some embodiments of the present disclosure Figure 4 ;

[0029] Figure 8 A transmission diagram of precoding indication information provided in some embodiments of the present disclosure Figure 2 ;

[0030] Fig. 9 A transmission diagram of precoding indication information provided in some embodiments of the present disclosure Figure 3 ;

[0031] Fig.10 A transmission diagram of precoding indication information provided in some embodiments of the present disclosure Figure 4 ;

[0032] Fig.11 The process of indicating the precoding information provided by some embodiments of the present disclosure Figure 5 ;

[0033] Fig.12 A signal transmission schematic diagram provided for some embodiments of the present disclosure;

[0034] Fig.13 The process of indicating the precoding information provided by some embodiments of the present disclosure Figure 6 ;

[0035] Fig.14 The process of indicating the precoding information provided by some embodiments of the present disclosure Figure 7 ;

[0036] Fig.15 A schematic diagram of a structure of an indication device provided in some embodiments of the present disclosure Figure 1 ;

[0037] Fig.16 A schematic diagram of a structure of an indication device provided in some embodiments of the present disclosure Figure 2 ;

[0038] Fig.17 A schematic diagram of the structure of a communication device provided in some embodiments of the present disclosure. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the present disclosure to clearly and completely describe the technical solutions in the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] It should be noted that, in the present disclosure, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present disclosure should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0041] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0042] In the description of the present disclosure, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more.

[0043] As mentioned in the background technology, in wireless communication systems, in order to improve energy efficiency and spectrum efficiency, multi-antenna base stations usually use beams to send signals to users or perform beam training. The base station forms a transmit beam by changing the transmit amplitude and phase of each antenna. For example, assuming that the base station has a total of N antennas, the transmit amplitude and phase of the N antennas are arranged into an N-dimensional vector, which is the precoding vector F of the transmit antenna.

[0044] However, in actual transmission, there may be some limitations, including hardware limitations of the base station antenna array and limitations of the precoding vector F. For example, the power amplifier of the antenna is limited, and the amplitude of each element in the precoding vector F needs to be limited to a certain range; for example, when multiple antennas are connected to a power amplifier, the transmission weights of the antennas connected to the same power amplifier must meet the constant modulus constraint (that is, the modulus values ​​of some elements in the precoding vector are equal).

[0045] If only a single beam is sent during transmission, the base station can achieve the transmission of a directional beam under the above restrictions by changing the transmission phase of each antenna in the antenna array (the amplitude of each antenna is the same). However, in the process of communication or beam training between the base station and the user, in order to improve the efficiency of beam training, the base station often needs to send multiple beams at the same time. Assume that the base station sends L beams at the same time, the precoding vector F = F1 + F2 + ... + FL formed by superimposing the weights of the precoding vectors of the L beams no longer satisfies the above constant modulus constraint. At this time, the precoding vector actually sent is There is a difference between the precoding vector F and the theoretical precoding vector F, and this difference will lead to a decrease in the receiving efficiency of the receiving end.

[0046] In response to the above technical problems, the embodiments of the present disclosure provide a method for indicating precoding information, the idea of ​​which is: first determine a first precoding vector; then process the first precoding vector to obtain a second precoding vector, the second precoding vector is used for a reference signal; finally determine precoding indication information based on the first precoding vector and the second precoding vector, and send the precoding indication information to the terminal device. It can be understood that based on the method provided by the embodiments of the present disclosure, when the second precoding vector used in actually sending a reference signal is inconsistent with the first precoding vector obtained by theoretical calculation, the precoding indication information can be determined based on the first precoding vector and the second precoding vector, and the terminal device can be informed to help the terminal device better receive the reference signal and improve the signal reception efficiency of the terminal device.

[0047] The technical solution provided by the embodiments of the present disclosure can be applied to various mobile communication networks, for example, a new radio (NR) mobile communication network using 5G, a future mobile communication network, or a variety of communication convergence systems, etc., and the embodiments of the present disclosure are not limited to this.

[0048] The network architecture of the mobile communication network (including but not limited to 3G, 4G, 5G and future mobile communication networks) in the disclosed embodiment may include at least a first communication node and a second communication node. It should be understood that in this example, in the downlink, the first communication node may be a network side device (for example, including but not limited to a base station), and the second communication node may be a terminal side device (for example, including but not limited to a terminal device). Of course, in the uplink, the first communication node may also be a terminal side device, and the second communication node may also be a network side device. In the device-to-device communication between the two communication nodes, the first communication node and the second communication node may both be a base station or a terminal device. The first communication node and the second communication node may be referred to as the first node and the second node, respectively.

[0049] Exemplarily, taking the first communication node as a base station and the second communication node as a terminal device as an example, Figure 1 FIG. 1 is a schematic diagram showing a network architecture of a mobile communication network provided by an embodiment of the present disclosure. Figure 1 As shown, the mobile communication network includes a base station 110 and a terminal device 120 .

[0050] In some embodiments, base station 110 is used to transmit and receive electromagnetic waves.

[0051] In some embodiments, the base station 110 can be a base station or an evolved base station (eNB or eNodeB) in long term evolution (LTE), long term evolution advanced (LTEA), a base station device in a 5G network, or a base station in a future communication system, etc. The base station may include various macro base stations, micro base stations, home base stations, wireless remote stations, reconfigurable intelligent surfaces (RIS), routers, wireless fidelity (WIFI) devices, and other network side devices.

[0052] In some embodiments, Figure 2 As shown, the base station 110 includes: a controller 111 and an antenna 112. The controller 111 is used to manage the wireless communication interface and the wireless channel. The antenna 112 is used to transmit and receive electromagnetic waves. Exemplarily, the antenna 112 can transmit electromagnetic waves according to the control of the controller 111.

[0053] In some embodiments, the antenna 112 may include an antenna array, which includes multiple antenna elements. The antenna elements may be used to transmit and receive signals. For example, in the transmission mode, the antenna element may be used as a transmission antenna to transmit signals; in the reception mode, the antenna element may be used as a reception antenna to receive signals.

[0054] In some embodiments, the base station 110 may further include a communication interface 113 for exchanging information with other devices.

[0055] In some embodiments, the base station 110 may further include a memory 114 for storing data.

[0056] Exemplarily, the memory 114 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0057] In some embodiments, the terminal device 120 may be a device with wireless transceiver function, which may be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it may also be deployed on the water surface (such as a ship, etc.); it may also be deployed in the air (such as an airplane, a balloon, and a satellite, etc.). The terminal device may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present disclosure do not limit the application scenarios. The terminal device may sometimes also be referred to as a user, UE, access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal, wireless communication equipment, UE agent or UE device, etc., but the embodiments of the present disclosure are not limited to this.

[0058] It should be noted that Figure 1 This is just an exemplary framework diagram. Figure 1 The number of devices included in the Figure 1 In addition to the devices shown, the communication system may also include other devices, such as core network devices.

[0059] The application scenarios of the embodiments of the present disclosure are not limited. The system architecture and business scenarios described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. It is known to those skilled in the art that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

[0060] The following is a detailed introduction to the method for indicating precoding information provided by an embodiment of the present disclosure.

[0061] The present disclosure provides a method for indicating precoding information, such as Figure 3 As shown, the method comprises the following steps:

[0062] S201. A base station determines a first precoding vector.

[0063] In some embodiments, the above step S201 may be implemented as follows: the base station determines the first precoding vector based on a preset linear constructor.

[0064] Exemplarily, the base station selects n codewords from a codebook based on a preset linear constructor, and performs weighted combination on the n codewords to obtain a first precoding vector, where n is an integer greater than or equal to 1.

[0065] S202: The base station processes the first precoding vector to obtain a second precoding vector.

[0066] The second precoding vector is used to measure the reference signal.

[0067] In some embodiments, the above step S202 is implemented as: processing the first precoding vector based on a nonlinear processing function to obtain a second precoding vector, wherein the modulus values ​​of the m elements in the second precoding vector are equal, and m is an integer greater than 1.

[0068] It should be noted that the nonlinear processing function is used to make the first precoding vector meet the hardware (eg, antenna hardware structure) constraints on the base station side.

[0069] Exemplarily, assuming that the antenna array includes N antenna elements, the normalized first precoding vector F = [f1, f2, ..., f N ] is an N-dimensional vector, the i-th element f i Represents the transmission amplitude and phase of the ith antenna. Due to the limitation of the antenna hardware structure at the base station side, multiple transmitting antennas are often connected to the same RF link, so the second precoding vector actually sent is Certain constraints need to be met, and the transmission amplitudes of antennas connected to the same RF link must be the same. For example, when N antennas are connected to the same RF link, the second precoding vector Each element in For another example, when m antennas among the N antennas are connected to the same radio frequency link, the moduli of the elements in the second precoding vector corresponding to the m antennas are equal.

[0070] S203. The base station determines precoding indication information based on the first precoding vector and the second precoding vector.

[0071] In some embodiments, the precoding indication information includes at least one of the following: distortion indication information, difference indication information, and parameter indication information.

[0072] The distortion indication information is used to indicate whether the first precoding vector is the same as the second precoding vector (i.e., whether the first precoding vector is distorted). Exemplarily, the base station may use a 1-bit signaling message to indicate whether the first precoding vector is distorted. If the bit is 1, it indicates that the first precoding vector is distorted. If the bit is 0, it indicates that the first precoding vector is not distorted.

[0073] The difference indication information is used to indicate the difference between the first precoding vector and the second precoding vector.

[0074] Exemplarily, the difference indication information includes at least one of the following: a residual vector obtained based on the difference between the first precoding vector and the second precoding vector, a modulus value of the residual vector, and a square of the modulus value of the residual vector.

[0075] For example, the residual vector can be expressed as in

[0076] The modulus of the residual vector can be expressed as the following formula (1):

[0077]

[0078] The square of the modulus of the residual vector can be expressed as the following formula (2):

[0079]

[0080] The parameter indication information is used to indicate the parameters of the nonlinear function used to generate the second precoding vector.

[0081] In some embodiments, when the first precoding vector F is generated by weighted combination of multiple codewords, the parameter indication information includes a weight α of each codeword, and the weight α is used to indicate the amplitude and phase of the codeword. Exemplarily, the first precoding vector is composed of L codewords b, and the transmission weight of each codeword is unequal, then the first precoding vector F can be expressed as the following formula (3):

[0082]

[0083] In some embodiments, the codeword weight may also be a difference value generated after the first precoding vector is distorted. Exemplarily assuming that the first precoding vector satisfies the above formula (3), the second precoding vector satisfies the following formula (4):

[0084]

[0085] The difference between the first precoding vector and the second precoding vector satisfies the following formula (5):

[0086]

[0087] Among them, λ i =∝ i +β i .

[0088] In some embodiments, the parameter indication information further includes the indexes of the n codewords selected by the base station from the codebook.

[0089] S204: The base station sends precoding indication information to the terminal device. Accordingly, the terminal device receives the precoding indication information sent by the base station.

[0090] In some embodiments, the base station may send one or more precoding indication information to the terminal device.

[0091] In some embodiments, the above method further includes: quantizing the precoding indication information.

[0092] Exemplarily, assuming that the precoding indication information includes a residual vector e, quantizing the precoding indication information includes: quantizing the amplitude and phase of each element in the residual vector e; or, linearly representing the residual vector using a set of preset basis vectors, and quantizing the result of the linear representation.

[0093] Exemplarily, the quantization process includes uniform quantization and non-uniform quantization. For example, assuming that the base station uses 3 bits to quantize the amplitude of each element in the residual vector, the result of the uniform bit quantization is shown in Table 1 below; the result of the non-uniform bit quantization is shown in Table 2 below.

[0094] Table 1

[0095] Serial number Quantization value 0 0 1 1 / 7 2 2 / 7 3 3 / 7 4 4 / 7 5 5 / 7 6 6 / 7 7 1

[0096] Table 2

[0097]

[0098] It is understandable that each element in the residual vector can be quantized using the above quantization method. In addition, the transmit precoding vector F, the modulus of the residual vector, the square of the modulus of the residual vector, the beam weight α, and the difference λ of the beam weight i The above mentioned methods can be used to quantify the elements.

[0099] Further, based on the above quantization processing, the above step S204 can be implemented as: sending the precoding indication information after the quantization processing to the terminal device.

[0100] As a possible implementation manner, the above step S104 may be implemented as follows: when a preset condition is met, precoding indication information is sent to the terminal device.

[0101] Exemplarily, the preset condition includes at least one of the following:

[0102] The reference signal reception quality reported by the terminal device is less than a first threshold;

[0103] The reference signal reception strength reported by the terminal device is less than the second threshold;

[0104] A signal to interference plus noise ratio (SINR) reported by the terminal device is less than a third threshold.

[0105] As another possible implementation manner, the above step S104 may also be implemented as: sending precoding indication information to the terminal device in response to a request from the terminal device.

[0106] In some embodiments, the above method further includes the following step S301.

[0107] S301: Send a reference signal to a terminal device based on precoding indication information. Correspondingly, the terminal device receives the reference signal sent by the base station.

[0108] It should be noted that the embodiment of the present disclosure does not limit the execution order of the above step S204 and step S301. Figure 4 As shown, step S204 may be performed first, and then step S301; or, as shown Figure 5 As shown, step S301 may be performed first and then step S204.

[0109] For example, Figure 6 As shown in (a) in the figure, the base station first sends a signal to the terminal device, and then sends the precoding indication information corresponding to the signal to the terminal device. For example, the base station first sends signal 1 to the terminal device, and then sends the precoding indication information 1 corresponding to signal 1 to the terminal device, so that the terminal device can receive signal 1 according to precoding indication information 1; the base station sends signal 2 to the terminal device, and then sends the precoding indication information 2 corresponding to signal 2 to the terminal device, so that the terminal device can receive signal 2 according to precoding indication information 2.

[0110] For example, Figure 6As shown in (b) in the figure, the base station first sends precoding indication information to the terminal device, and then sends the signal corresponding to the precoding indication information to the terminal device. For example, the base station first sends precoding indication information 1 to the terminal device, and then sends signal 1 corresponding to precoding indication information 1 to the terminal device, so that the terminal device can receive signal 1 according to precoding indication information 1; the base station first sends precoding indication information 2 to the terminal device, and then sends signal 2 corresponding to precoding indication information 2 to the terminal device, so that the terminal device can receive signal 2 according to precoding indication information 2.

[0111] For example, Figure 7 As shown, before the above step S204, the method further includes the following step S401:

[0112] S401: The terminal device sends a first message to the base station. Correspondingly, the base station receives the first message sent by the terminal device.

[0113] The first message is used to request precoding indication information.

[0114] Exemplarily, the first message is carried on a sounding reference signal (SRS); or, the first message is carried on uplink control information (UCI).

[0115] In some embodiments, the above step S401 may be implemented as: when the terminal device needs to improve its own reception quality or measurement accuracy, sending a first message to the base station.

[0116] As a possible implementation manner, based on the above step S401, the above step S204 can be implemented as: sending precoding indication information to the terminal device in response to the first message.

[0117] In some embodiments, the first message includes a sending method of the precoding indication information, wherein the sending method includes one of the following: the precoding indication information is carried in a reference signal; the precoding indication information is carried in signaling.

[0118] Accordingly, the above step S204 can be implemented as follows: based on the sending mode, sending the precoding indication information to the terminal device. The following introduces different sending modes respectively.

[0119] Transmission method 1: precoding indication information is carried in the reference signal.

[0120] As a possible implementation manner, the above-mentioned precoding indication information is the precoding indication information corresponding to the current reference signal. Figure 8As shown in (a), the base station sends signal 1, signal 2 and signal 3 to the terminal device respectively; wherein signal 1 includes precoding indication information 1 corresponding to signal 1; signal 2 includes precoding indication information 2 corresponding to signal 2; and signal 3 includes precoding indication information 3 corresponding to signal 3.

[0121] As another possible implementation, the precoding indication information is the precoding indication information corresponding to the previous reference signal. Figure 8 As shown in (b), the base station sends signal 2, signal 3 and signal 4 to the terminal device respectively; wherein signal 2 includes precoding indication information 1 corresponding to signal 1; signal 3 includes precoding indication information 2 corresponding to signal 2; and signal 4 includes precoding indication information 3 corresponding to signal 3.

[0122] As another possible implementation, the precoding indication information is the precoding indication information corresponding to the next reference signal. Figure 8 As shown in (c), the base station sends signal 1, signal 2 and signal 3 to the terminal device respectively; wherein signal 1 includes precoding indication information 2 corresponding to signal 2; signal 2 includes precoding indication information 3 corresponding to signal 3; signal 3 includes precoding indication information 4 corresponding to signal 4.

[0123] As another possible implementation, the reference signal may carry multiple precoding indication information. For example, the multiple precoding indication information includes precoding indication information corresponding to the current reference signal and precoding indication information corresponding to the previous or next reference signal.

[0124] For example, Fig. 9 As shown in (a), the base station sends signal 1 and signal 2 to the terminal device, wherein signal 1 includes precoding indication information 1 corresponding to signal 1 and precoding indication information 2 corresponding to signal 2; the base station sends signal 3 and signal 4 to the terminal device, wherein signal 3 includes precoding indication information 3 corresponding to signal 3 and precoding indication information 4 corresponding to signal 4.

[0125] For example, Fig. 9 As shown in (b), the base station sends signal 1 and signal 2 to the terminal device, wherein signal 2 includes precoding indication information 1 corresponding to signal 1 and precoding indication information 2 corresponding to signal 2; the base station sends signal 3 and signal 4 to the terminal device, wherein signal 4 includes precoding indication information 3 corresponding to signal 3 and precoding indication information 4 corresponding to signal 4.

[0126] Transmission method 2: precoding indication information is carried in signaling.

[0127] In some embodiments, the signaling includes at least one of the following: a master infromation block (MIB), a system infromation block (SIB), downlink control information (DCI), a media access control layer control element (MAC-CE), and a radio resource control layer (RRC) control signaling.

[0128] In some embodiments, the signaling may carry one or more precoding indication information.

[0129] For example, the signaling may carry a precoding indication information as described above. Figure 6 As shown in (a) in the figure, the base station first sends a signal 1 to the terminal device, and then sends a signaling including precoding indication information 1 corresponding to the signal 1 to the terminal device; or, the case where the signaling carries a precoding indication information can be as described above. Figure 6 As shown in (b), the base station first sends a signaling including precoding indication information 1 to the terminal device, and then sends a signal 1 corresponding to the precoding indication information 1 to the terminal device.

[0130] For example, the situation where the signaling carries multiple precoding indication information can be as follows: Fig.10 As shown in (a) in FIG. 1 , the base station first sends signal 1 and signal 2 to the terminal device, and then sends signaling including precoding indication information 1 and precoding indication information 2 to the terminal device; or, as shown in FIG. Fig.10 As shown in (b), the base station first sends a signaling including precoding indication information 1 and precoding indication information 2 to the terminal device, and then sends a signal 1 corresponding to the precoding indication information 1 and a signal 2 corresponding to the precoding indication information 2 to the terminal device.

[0131] For ease of understanding, the method for indicating precoding information is described below in the form of a scenario.

[0132] For example, in a scenario where a base station and a terminal device perform downlink beam training, the base station may send a downlink reference signal to the terminal device, and the terminal device then measures the downlink reference signal and reports the measurement result. For example, the terminal device may help the base station find at least one transmit beam with stronger energy.

[0133] like Fig.11 As shown, during the process of downlink beam training between the base station and the terminal device, the method for indicating precoding information can be implemented as the following steps:

[0134] Sa1. The base station sends a reference signal and precoding indication information to the terminal device.

[0135] The reference signal can be used to measure wireless channel parameters.

[0136] Exemplarily, the precoding indication information and the reference signal may be sent in any of the above-mentioned embodiments. For example, the base station may first send the precoding indication information and then send the reference signal; or, the base station may first send the reference signal and then send the precoding indication information; or, the precoding indication information may be carried in the reference signal.

[0137] In some embodiments, Fig.12 As shown, the base station can use multiple beams to send reference signals, wherein reference signals sent at different times use different beams. Fig.12 In the scenario shown, the precoding indication information also includes the sequence number of the beam sent by the base station.

[0138] In some embodiments, when a base station uses multiple beams to send a reference signal, the reference signal may simultaneously have a quasi co-location relationship with multiple reference signals.

[0139] In some embodiments, the beam number may be explicitly or implicitly carried in the reference signal. Exemplarily, when the beam number is explicitly carried in the reference signal, a bitmap may be used to indicate the beam used to transmit the reference signal; when the beam number is implicitly carried in the reference signal, the beam needs to correspond to the time domain resource of the transmitted signal. For example, as shown in Table 3 below, different time domain resources correspond to different beam numbers.

[0140] Table 3

[0141]

[0142] Exemplarily, the reference signal may include at least one of the following: a channel block (Synchronization Singal and PBCH Block, SSB) obtained by combining a synchronization signal and a physical broadcast channel block (Physical Broadcast Channel Block, PBCH), a channel state information reference signal (CSI-RS), a demodulation reference signal (Demdulation Reference Signal, DMRS), and a phase tracking reference signal (PT-RS).

[0143] In some embodiments, when the reference signal includes an SSB, the reference signal may be sent in the form of a set. Each SSB set includes multiple SSBs, and the SSBs are sent in the first half of each frame. In addition, the number of SSBs included in different SSB sets may be the same or different. Exemplarily, for different frequency bands, the number of SSBs included in the SSB set is different; or, the number of SSBs included in the SSB set may be configured by the base station. For example, below the 6 GHz frequency band, each SSB set contains 4 or 8 SSBs, and above the 6 GHz frequency band, each SSB set contains 64 SSBs.

[0144] In some embodiments, when the reference signal includes CSI-RS, the reference signal may also be sent in a grouped manner. For example, the base station may configure multiple CSI-RS resource groups for the terminal device, each CSI-RS resource group including multiple CSI-RS resources.

[0145] Sa2. The terminal device sends the measurement results to the base station.

[0146] Exemplarily, the measurement results may include at least one of the following: reference signal receiving quality (Reference Signal Receiving Quality, RSRQ), reference signal receiving strength (Reference Singal Receiving Power, RSRP), reference signal strength indication (Reference Signal Strength Indicator, RSSI), reference signal time-frequency resources, reference signal time domain sequence number, and reference signal group sequence number.

[0147] As a possible implementation, the base station sends a reference signal and precoding indication information corresponding to the reference signal to the terminal device, and accordingly, the terminal device also sends a measurement result to the base station, where the measurement result includes a measurement result of the reference signal. Fig.13 As shown, the base station sends reference signal 1 and precoding indication information 1 of reference signal 1 to the terminal device; accordingly, the terminal device sends the measurement result of reference signal 1 to the base station; then, the base station sends reference signal 2 and precoding indication information 2 of reference signal 2 to the terminal device; accordingly, the terminal device sends the measurement result of reference signal 2 to the base station.

[0148] As another possible implementation, after the base station sends multiple reference signals and precoding indication information corresponding to the multiple reference signals to the terminal device, the terminal device sends a measurement result to the base station, and the measurement result may include the measurement results of the multiple reference signals, or the measurement results of some of the multiple reference signals. For example, Fig.14 As shown, the base station sequentially sends reference signal 1 and precoding indication information 1 of reference signal 1, reference signal 2 and precoding indication information 2 of reference signal 2, and reference signal 3 and precoding indication information 3 of reference signal 3 to the terminal device. Afterwards, the terminal device sends a measurement result to the base station, which may include measurement results of reference signal 1, reference signal 2, and reference signal 3, or measurement results of any one or two of the three reference signals.

[0149] Exemplarily, in the case where the base station sends multiple reference signals to the terminal device, the terminal device sending the measurement result to the base station may include any of the following:

[0150] an identifier of a first reference signal having the strongest signal strength among the multiple reference signals and a received strength of the first reference signal;

[0151] L reference signals among the multiple reference signals whose signal strength is greater than a preset threshold, and the receiving strength of each of the L reference signals; L is an integer greater than or equal to 1;

[0152] The sequence number of the reference signal group to which the first reference signal with the strongest signal strength among the multiple reference signals belongs, and the received strength of the first reference signal.

[0153] The above mainly introduces the scheme of the embodiment of the present disclosure from the perspective of the method. It can be understood that in order to realize the above functions, the indicating device includes at least one of the hardware structure and software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiment disclosed herein, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the embodiment of the present disclosure.

[0154] It is understandable that, in order to realize the above functions, the indicating device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments of the present disclosure, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present disclosure.

[0155] The disclosed embodiment can divide the indicating device into functional modules according to the above method embodiment. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the disclosed embodiment is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0156] Fig.15 is a schematic diagram of the structure of an indication device provided in an embodiment of the present disclosure. The indication device is applied to a base station and can execute the indication method of precoding information provided in the above method embodiment. Fig.15 As shown, the indicating device 600 includes: a determining module 601, a processing module 602 and a sending module 603. In some other embodiments, the indicating device 600 further includes a receiving module 604.

[0157] The determination module 601 is configured to determine a first precoding vector.

[0158] The processing module 602 is used to process the first precoding vector to obtain a second precoding vector, where the second precoding vector is used for a reference signal.

[0159] The determination module 601 is configured to determine precoding indication information based on the first precoding vector and the second precoding vector.

[0160] The sending module 603 is used to send precoding indication information to the terminal device.

[0161] In some embodiments, the determination module 601 is specifically configured to determine a first precoding vector based on a preset linear constructor.

[0162] In some embodiments, the determination module 601 is specifically configured to select n codewords from a codebook based on a preset linear constructor, where n is an integer greater than or equal to 1; and perform weighted combination on the n codewords to obtain a first precoding vector.

[0163] In some embodiments, the processing module 602 is specifically configured to process the first precoding vector based on a nonlinear processing function to obtain a second precoding vector.

[0164] In some embodiments, the modulus values ​​of the m elements in the second precoding vector are equal, and m is an integer greater than 1.

[0165] In some embodiments, the precoding indication information includes at least one of the following: distortion indication information, difference indication information, and parameter indication information; wherein the distortion indication information is used to indicate whether the first precoding vector is the same as the second precoding vector; the difference indication information is used to indicate the difference between the first precoding vector and the second precoding vector; and the parameter indication information is used to indicate the parameters of the nonlinear function used to generate the second precoding vector.

[0166] In some embodiments, the difference indication information includes at least one of the following: a residual vector obtained based on the difference between the first precoding vector and the second precoding vector, a modulus value of the residual vector, and a square of the modulus value of the residual vector.

[0167] In some embodiments, the sending module 603 is further used to send a reference signal to the terminal device based on the precoding indication information.

[0168] In some embodiments, the precoding indication information is carried in a reference signal.

[0169] In some embodiments, the precoding indication information is carried in signaling, and the signaling includes at least one of the following: a main system message block, a system message block, downlink control information, control signaling of a medium access control layer control unit, and control signaling of a radio resource control layer.

[0170] In some embodiments, the processing module 602 is further used to perform quantization processing on the precoding indication information, and the quantization processing includes uniform quantization and non-uniform quantization; the sending module 603 is further used to send the precoding indication information after quantization processing to the terminal device.

[0171] In some embodiments, the receiving module 604 is used to receive a first message sent by a terminal device, where the first message is used to request precoding indication information; the sending module 603 is specifically used to send precoding indication information to the terminal device in response to the first message.

[0172] In some embodiments, the first message includes a sending method of the precoding indication information, and the sending method includes one of the following: carrying on a reference signal, carrying on signaling; the sending module 603 is specifically used to send the precoding indication information to the terminal device based on the sending method.

[0173] In some embodiments, the first message is carried in a sounding reference signal; or, the first message is carried in uplink control information.

[0174] In some embodiments, the sending module 603 is specifically configured to send precoding indication information to the terminal device when a preset condition is met; wherein the preset condition includes at least one of the following:

[0175] The reference signal reception quality reported by the terminal device is less than a first threshold;

[0176] The reference signal reception strength reported by the terminal device is less than the second threshold;

[0177] The signal to interference plus noise ratio reported by the terminal device is less than the third threshold.

[0178] Fig.16 is a schematic diagram of the structure of another indication device provided by an embodiment of the present disclosure, the indication device is applied to a terminal device and can execute the indication method of precoding information provided by the above method embodiment. Fig.16 As shown, the indicating device 700 includes: a receiving module 701. In some other embodiments, the indicating device 700 also includes: a sending module 702.

[0179] The receiving module 701 is used to receive precoding indication information sent by the base station; wherein the precoding indication information is determined by a first precoding vector and a second precoding vector; the second precoding vector is determined based on the first precoding vector, and the second precoding vector is used to measure a reference signal.

[0180] In some embodiments, the first precoding vector is determined based on a preset linear constructor.

[0181] In some embodiments, the first precoding vector is obtained by weighting n codewords, wherein the n codewords are codewords selected from a codebook based on a preset linear constructor, and n is an integer greater than or equal to 1.

[0182] In some embodiments, the second precoding vector is obtained by processing the first precoding vector based on a nonlinear processing function.

[0183] In some embodiments, the modulus values ​​of the m elements in the second precoding vector are equal, and m is an integer greater than 1.

[0184] In some embodiments, the precoding indication information includes at least one of the following: distortion indication information, difference indication information, and parameter indication information; wherein the distortion indication information is used to indicate whether the first precoding vector is the same as the second precoding vector; the difference indication information is used to indicate the difference between the first precoding vector and the second precoding vector; and the parameter indication information is used to indicate the parameters of the nonlinear function used to generate the second precoding vector.

[0185] In some embodiments, the difference indication information includes at least one of the following: a residual vector obtained based on the difference between the first precoding vector and the second precoding vector, a modulus value of the residual vector, and a square of the modulus value of the residual vector.

[0186] In some embodiments, the receiving module 701 is further used to receive a reference signal sent by a base station.

[0187] In some embodiments, the precoding indication information is carried in a reference signal.

[0188] In some embodiments, the precoding indication information is carried in signaling, and the signaling includes at least one of the following: a main system message block, a system message block, downlink control information, control signaling of a medium access control layer control unit, and control signaling of a radio resource control layer.

[0189] In some embodiments, the receiving module 701 is specifically configured to receive precoding indication information after quantization processing, where the quantization processing includes uniform quantization and non-uniform quantization.

[0190] In some embodiments, the sending module 702 is used to send a first message to the terminal device, where the first message is used to request precoding indication information.

[0191] In some embodiments, the first message includes a sending method of the precoding indication information, and the sending method includes one of the following: carried in a reference signal and carried in signaling.

[0192] In some embodiments, the first message is carried in a sounding reference signal; or, the first message is carried in uplink control information.

[0193] In the case of implementing the functions of the above-mentioned integrated modules in the form of hardware, the embodiments of the present disclosure provide a possible structure of the communication device involved in the above-mentioned embodiments. Fig.17 As shown, the communication device 800 includes: a processor 802 and a bus 804. Optionally, the communication device may further include a memory 801; optionally, the communication device 800 may further include a communication interface 803.

[0194] The processor 802 may be a processor that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 802 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 802 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0195] The communication interface 803 is used to connect with other devices via a communication network, such as Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0196] The memory 801 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0197] As a possible implementation, the memory 801 may exist independently of the processor 802, and the memory 801 may be connected to the processor 802 via a bus 804 for storing instructions or program codes. When the processor 802 calls and executes the instructions or program codes stored in the memory 801, the method for indicating precoding information provided in the embodiment of the present disclosure can be implemented. In another possible implementation, the memory 801 may also be integrated with the processor 802.

[0198] The bus 804 may be an extended industry standard architecture (EISA) bus, etc. The bus 804 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.17 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0199] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), in which computer program instructions are stored. When the computer program instructions are executed on a computer, the computer executes the method for indicating precoding information as described in any of the above embodiments.

[0200] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or magnetic tapes, etc.), optical disks (e.g., compact disks (CD), digital versatile disks (DVD), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0201] An embodiment of the present disclosure provides a computer program product including instructions. When the computer program product is run on a computer, the computer is enabled to execute the method for indicating precoding information described in any one of the above embodiments.

[0202] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A method for indicating precoding information, characterized in that: Applied to a base station, the method comprises: determining a first precoding vector; Processing the first precoding vector to obtain a second precoding vector, where the second precoding vector is used for a reference signal; Precoding indication information is determined based on the first precoding vector and the second precoding vector, and the precoding indication information is sent to a terminal device.

2. The method according to claim 1, characterized in that The determining of the first precoding vector comprises: Based on a preset linear constructor, the first precoding vector is determined.

3. The method according to claim 2, characterized in that The determining the first precoding vector based on a preset linear constructor includes: Based on the preset linear constructor, select n codewords from a codebook, where n is an integer greater than or equal to 1; The n codewords are weightedly combined to obtain the first precoding vector.

4. The method according to claim 1, characterized in that: The processing of the first precoding vector to obtain a second precoding vector includes: The first precoding vector is processed based on a nonlinear processing function to obtain the second precoding vector.

5. The method according to claim 1, characterized in that: The moduli of the m elements in the second precoding vector are equal, and m is an integer greater than 1.

6. The method according to claim 1, characterized in that The precoding indication information includes at least one of the following: distortion indication information, difference indication information, and parameter indication information; The distortion indication information is used to indicate whether the first precoding vector is the same as the second precoding vector; the difference indication information is used to indicate the difference between the first precoding vector and the second precoding vector; and the parameter indication information is used to indicate the parameters of the nonlinear function used to generate the second precoding vector.

7. The method according to claim 6, characterized in that The difference indication information includes at least one of the following: a residual vector obtained based on the difference between the first precoding vector and the second precoding vector, a modulus value of the residual vector, and a square of the modulus value of the residual vector.

8. The method according to claim 1, characterized in that Before sending the precoding indication information to the terminal device, the method further includes: Based on the precoding indication information, a reference signal is sent to the terminal device.

9. The method according to claim 1, characterized in that: After sending the precoding indication information to the terminal device, the method further includes: Based on the precoding indication information, a reference signal is sent to the terminal device.

10. The method according to claim 1, characterized in that The precoding indication information is carried in a reference signal.

11. The method according to claim 1, characterized in that: The precoding indication information is carried in signaling, and the signaling includes at least one of the following: a main system message block, a system message block, downlink control information, control signaling of a medium access control layer control unit, and control signaling of a radio resource control layer.

12. The method according to claim 1, characterized in that The method further comprises: Performing quantization processing on the precoding indication information, wherein the quantization processing includes uniform quantization and non-uniform quantization; The sending precoding indication information to the terminal device includes: Sending the precoding indication information after quantization processing to the terminal device.

13. The method according to claim 1, characterized in that The method further comprises: receiving a first message sent by the terminal device, where the first message is used to request precoding indication information; The sending precoding indication information to the terminal device includes: In response to the first message, the precoding indication information is sent to the terminal device.

14. The method according to claim 13, characterized in that The first message includes a sending mode of the precoding indication information, and the sending mode includes one of the following: carried in a reference signal and carried in signaling; The sending the precoding indication information to the terminal device includes: Based on the sending method, the precoding indication information is sent to the terminal device.

15. The method according to claim 13, characterized in that The first message is carried in a sounding reference signal; or, the first message is carried in uplink control information.

16. The method according to claim 1, characterized in that The sending precoding indication information to the terminal device includes: When a preset condition is met, precoding indication information is sent to the terminal device; wherein the preset condition includes at least one of the following: The reference signal reception quality reported by the terminal device is less than a first threshold; The reference signal reception strength reported by the terminal device is less than a second threshold; The signal to interference plus noise ratio reported by the terminal device is less than a third threshold.

17. A method for indicating precoding information, characterized in that: Applied to a terminal device, the method comprises: Receive precoding indication information sent by a base station; wherein the precoding indication information is determined by a first precoding vector and a second precoding vector; the second precoding vector is determined based on the first precoding vector, and the second precoding vector is used to measure a reference signal.

18. The method according to claim 17, characterized in that The first precoding vector is determined based on a preset linear constructor.

19. The method according to claim 18, characterized in that The first precoding vector is obtained by weighting n codewords, wherein the n codewords are codewords selected from a codebook based on a preset linear constructor, and n is an integer greater than or equal to 1.

20. The method according to claim 17, characterized in that The second precoding vector is obtained by processing the first precoding vector based on a nonlinear processing function.

21. The method according to claim 17, characterized in that The moduli of the m elements in the second precoding vector are equal, and m is an integer greater than 1.

22. The method according to claim 17, characterized in that The precoding indication information includes at least one of the following: distortion indication information, difference indication information, and parameter indication information; The distortion indication information is used to indicate whether the first precoding vector is the same as the second precoding vector; the difference indication information is used to indicate the difference between the first precoding vector and the second precoding vector; and the parameter indication information is used to indicate the parameters of the nonlinear function used to generate the second precoding vector.

23. The method according to claim 22, characterized in that The difference indication information includes at least one of the following: a residual vector obtained based on the difference between the first precoding vector and the second precoding vector, a modulus value of the residual vector, and a square of the modulus value of the residual vector.

24. The method according to claim 17, characterized in that Before receiving the precoding indication information sent by the base station, the method further includes: Receive a reference signal sent by a base station.

25. The method according to claim 17, characterized in that After receiving the precoding indication information sent by the base station, the method further includes: Receive a reference signal sent by a base station.

26. The method according to claim 17, characterized in that The precoding indication information is carried in a reference signal.

27. The method according to claim 17, characterized in that The precoding indication information is carried in signaling, and the signaling includes at least one of the following: a main system message block, a system message block, downlink control information, control signaling of a medium access control layer control unit, and control signaling of a radio resource control layer.

28. The method according to claim 17, characterized in that The receiving precoding indication information sent by the base station includes: The precoding indication information after quantization processing is received, where the quantization processing includes uniform quantization and non-uniform quantization.

29. The method according to claim 17, characterized in that The method further comprises: A first message is sent to the terminal device, where the first message is used to request precoding indication information.

30. The method according to claim 29, characterized in that The first message includes a sending method of the precoding indication information, and the sending method includes one of the following: carried in a reference signal and carried in signaling.

31. The method according to claim 29, characterized in that The first message is carried in a sounding reference signal; or, the first message is carried in uplink control information.

32. A communication device, characterized in that: include: Memory and processor; Memory and processor coupling; The memory is used to store instructions executable by the processor; When the processor executes the instruction, the method for indicating precoding information according to any one of claims 1 to 31 is performed.

33. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on an electronic device, the electronic device executes the method for indicating precoding information as described in any one of claims 1 to 31.

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